Refactor sound settings page for catalyst

We have preferences existing in the sound settings page and new sound
screen. In order to ensure VolumeSeekBarPreferences work smoothly,
this changes support adding callback handling to
VolumeSeekBarPreferences that are migrated in the new screens.

Bug: 360015496
Test: visual test
Flag: EXEMPT refactor the existing feature
Change-Id: Iaee4581f1c2687db0b405cd9edbfef2088d9bb12

src/com/android/settings/notification/SoundSettings.java

@@ -113,6 +113,14 @@ public class SoundSettings extends DashboardFragment implements OnActivityResult
         if (phoneRingTonePreference != null && openPhoneRingtonePicker) {
             onPreferenceTreeClick(phoneRingTonePreference);
         }
+        if (isCatalystEnabled()) {
+            for (String key : getPreferenceKeysInHierarchy()) {
+                Preference preference = findPreference(key);
+                if (preference instanceof VolumeSeekBarPreference) {
+                    ((VolumeSeekBarPreference) preference).setCallback(mVolumeCallback);
+                }
+            }
+        }
     }
 
     @Override